Mapping fields in Oracle SQL Loader

Question

When loading an external csv with Oracle SQL Loader is there a way to map the fields directly to each other in the control file?

At the moment I\'m doing a simple loadin

Answer 1

You can include any data processing by means of Oracle functions in your control file.
E.g., this code swaps columns 1 and 2 and additionally converts source_field2 to number, silently replacing wrong values to nulls:

load data
append
into table SCHEMA.TABLE
fields terminated by ';' optionally enclosed by '"'
trailing nullcols
(
  source_field1     BOUNDFILLER,
  source_field2     BOUNDFILLER,
  source_field3     BOUNDFILLER,
  destination_field1 "to_number(regexp_substr(:source_field2, '^[-0-9,]*'),'9999999999D999','NLS_NUMERIC_CHARACTERS='', ''')",
  destination_field2 ":source_field1",
  destination_field3 ":source_field3"
)